Question

$\frac{x - y}{x {}^{ \frac{1}{2} } + y {}^{ \frac{1}{2} } }$
Дам 50 баллов!!! ​

Answer 1

(x-y)/(√x+√y)=((√x)^2-(√y)^2))/(√x+√y)=(√x+√y)(√x-√y)/(√x+√y)=√x-√y